No.1 User Profile : You can check your profile information and change nickname here
No.2 Expanded Menu : You can use Gacha / Shop / Locker / My Team / Exchange / Spin / Collect / Ranking / Attend /
NFT / Transaction here
No.3 Upper Menu : You can use Mission / Mailbox / Setting features here
No.4 You can select a Game Mode here
For more detail, please see General FAQ